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<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
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		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
		<title>为什么在加粗、下划线、斜体不用标签而用css的原因</title>
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			strong{
				color: red;
			}
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	</head>
	<body>
		<strong>我是加粗标签</strong>
	</body>
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